I bought this futon/ sofa bed for my daughter's playroom, and it's perfect for what we need! Now adults have a place to sit when playing, and we have an extra kid bed for when cousins and friends sleep over. 
It is a bit firm, but that's what we like. I would say it's great for occasional adult sitting, and extra sleeping for children. 

Sturdy, easy to flatten, super easy to put together - took 5 minutes! Love the color too! (I got the green, and I love the tone. I would worried it would look cheap, but it doesn't!)